perioodilisi

Perioodilisi is a term used in speculative medical literature and science fiction to denote a hypothetical periodic dilation phenomenon affecting peri- structures. The term blends the prefix peri- "around" with a neologism derived from dilation, signalling cyclic expansion. It is not recognized by major medical authorities and is not described in standard clinical references.

In conceptual use, perioodilisi is described as recurring episodes that last from several minutes to several hours, with a prodrome of fatigue, lightheadedness, or mild sensory alterations, followed by a phase of partial recovery. The precise anatomical focus varies by author, sometimes described as cyclic dilation of perivascular spaces, peri-neural tissues, or surrounding organ strata.

Pathophysiology in fictional treatments often centers on dysregulated autonomic control, episodic release of vasoactive mediators, or feedback loops between neural and immune pathways. Because it is not based on empirical research, there are no evidence-based diagnostic criteria or guidelines; fictional descriptions typically rely on patient history, episodic monitoring, and illustrative imaging showing periodic tissue changes.

In literary and speculative contexts, perioodilisi is used to explore themes such as the boundaries between normal physiological variability and disease, the pace of scientific discovery, and linguistic creativity in neologism formation.